Report initial CustomTab navigation with client package name to DataUseTabUIManager

chrome/android/java/src/org/chromium/chrome/browser/datausage/DataUseTabUIManager.java

Index: chrome/android/java/src/org/chromium/chrome/browser/datausage/DataUseTabUIManager.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/datausage/DataUseTabUIManager.java b/chrome/android/java/src/org/chromium/chrome/browser/datausage/DataUseTabUIManager.java
index a02f20ac8a238394dc96ad2fdd841bfc073409ac..4688135085ede6172507a1c98136623c919c36f5 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/datausage/DataUseTabUIManager.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/datausage/DataUseTabUIManager.java
@@ -34,7 +34,19 @@ public class DataUseTabUIManager {
                 SessionTabHelper.sessionIdForTab(tab.getWebContents()), tab.getProfile());
     }
 
-    private static native boolean nativeHasDataUseSessionStarted(int tabId, Profile profile);
+    /**
+     * Tells native code that a custom tab is loading a url from the given client package.
+     *
+     * @param tab The tab that is loading.
+     * @param packageName The client package for the custom tab loading a url.
+     */
+    public static void customTabIsLoadingURL(Tab tab, String packageName) {
+        nativeCustomTabIsLoadingURL(SessionTabHelper.sessionIdForTab(tab.getWebContents()),
+                packageName, tab.getProfile());
+    }
 
+    private static native boolean nativeHasDataUseSessionStarted(int tabId, Profile profile);
     private static native boolean nativeIsDataUseSessionExiting(int tabId, Profile profile);
+    private static native void nativeCustomTabIsLoadingURL(int tabID, String packageName,
+            Profile profile);
 }